title: Pyelocaliceal diverticulum presenting as a disappearing renal mass.
abstract: We report a rare case of a disappearing cystic mass of the kidney. Pyelocaliceal diverticulum has to be considered in the differential diagnosis of patients with pyelonephritis and a space-occupying lesion of the kidney. Initial conservative therapy with antibiotics helps to determine the definitive diagnosis. Surgical management is recommended to prevent sequelae of pain and infection.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004240:Diverticulum / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007670:Kidney Calices; D007674:Kidney Diseases / Q000175:diagnosis*; D007682:Kidney Pelvis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014567:Urography